https://bugzilla.novell.com/show_bug.cgi?id=416404
Summary: Resolver blocks and cannot be aborted (ping)
Product: openSUSE 11.0
Version: Final
Platform: Other
OS/Version: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Basesystem
AssignedTo: bnc-team-screening@forge.provo.novell.com
ReportedBy: lmb@novell.com
QAContact: qa@suse.de
Found By: Development
Created an attachment (id=232808)
--> (https://bugzilla.novell.com/attachment.cgi?id=232808)
strace -ro from ping
If I call "ping dale.suse.de" on my 11.0 system, tries to lookup the address,
which can take a while. That is annoying, but more annoying is that I cannot
abort the lookup:
ping dale.suse.de
PING dale.suse.de (10.10.2.87) 56(84) bytes of data.
^C^C^C^C^C^C^C^C64 bytes from 10.10.2.87: icmp_seq=1 ttl=62 time=38.0 ms
--- dale.suse.de ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 38.037/38.037/38.037/0.000 ms
As you can see, the system did not respond to the SIGINT immediately; in fact,
this takes >5 seconds!
A direct strace to the console can be aborted immediately:
connect(4, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("192.168.1.1")}, 28) = 0
fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
gettimeofday({1218486639, 30936}, NULL) = 0
poll([{fd=4, events=POLLOUT, revents=POLLOUT}], 1, 0) = 1
send(4, "\370\210\1\0\0\1\0\0\0\0\0\0\00287\0012\00210\00210\7in-addr\4"...,
41, MSG_NOSIGNAL) = 41
poll(^C